Commit | Line | Data |
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f0706e82 JB |
1 | /* |
2 | * Copyright 2004, Instant802 Networks, Inc. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | */ | |
8 | ||
9 | #include <linux/netdevice.h> | |
10 | #include <linux/skbuff.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/if_arp.h> | |
13 | #include <linux/types.h> | |
14 | #include <net/ip.h> | |
15 | #include <net/pkt_sched.h> | |
16 | ||
17 | #include <net/mac80211.h> | |
18 | #include "ieee80211_i.h" | |
19 | #include "wme.h" | |
20 | ||
f0706e82 JB |
21 | /* maximum number of hardware queues we support. */ |
22 | #define TC_80211_MAX_QUEUES 8 | |
23 | ||
24 | struct ieee80211_sched_data | |
25 | { | |
26 | struct tcf_proto *filter_list; | |
27 | struct Qdisc *queues[TC_80211_MAX_QUEUES]; | |
28 | struct sk_buff_head requeued[TC_80211_MAX_QUEUES]; | |
29 | }; | |
30 | ||
a8bdf29c | 31 | static const char llc_ip_hdr[8] = {0xAA, 0xAA, 0x3, 0, 0, 0, 0x08, 0}; |
f0706e82 JB |
32 | |
33 | /* given a data frame determine the 802.1p/1d tag to use */ | |
34 | static inline unsigned classify_1d(struct sk_buff *skb, struct Qdisc *qd) | |
35 | { | |
36 | struct iphdr *ip; | |
37 | int dscp; | |
38 | int offset; | |
39 | ||
40 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
41 | struct tcf_result res = { -1, 0 }; | |
42 | ||
43 | /* if there is a user set filter list, call out to that */ | |
44 | if (q->filter_list) { | |
45 | tc_classify(skb, q->filter_list, &res); | |
46 | if (res.class != -1) | |
47 | return res.class; | |
48 | } | |
49 | ||
50 | /* skb->priority values from 256->263 are magic values to | |
51 | * directly indicate a specific 802.1d priority. | |
52 | * This is used to allow 802.1d priority to be passed directly in | |
53 | * from VLAN tags, etc. */ | |
54 | if (skb->priority >= 256 && skb->priority <= 263) | |
55 | return skb->priority - 256; | |
56 | ||
57 | /* check there is a valid IP header present */ | |
a8bdf29c GC |
58 | offset = ieee80211_get_hdrlen_from_skb(skb); |
59 | if (skb->len < offset + sizeof(llc_ip_hdr) + sizeof(*ip) || | |
60 | memcmp(skb->data + offset, llc_ip_hdr, sizeof(llc_ip_hdr))) | |
f0706e82 JB |
61 | return 0; |
62 | ||
a8bdf29c | 63 | ip = (struct iphdr *) (skb->data + offset + sizeof(llc_ip_hdr)); |
f0706e82 JB |
64 | |
65 | dscp = ip->tos & 0xfc; | |
66 | if (dscp & 0x1c) | |
67 | return 0; | |
68 | return dscp >> 5; | |
69 | } | |
70 | ||
71 | ||
72 | static inline int wme_downgrade_ac(struct sk_buff *skb) | |
73 | { | |
74 | switch (skb->priority) { | |
75 | case 6: | |
76 | case 7: | |
77 | skb->priority = 5; /* VO -> VI */ | |
78 | return 0; | |
79 | case 4: | |
80 | case 5: | |
81 | skb->priority = 3; /* VI -> BE */ | |
82 | return 0; | |
83 | case 0: | |
84 | case 3: | |
85 | skb->priority = 2; /* BE -> BK */ | |
86 | return 0; | |
87 | default: | |
88 | return -1; | |
89 | } | |
90 | } | |
91 | ||
92 | ||
93 | /* positive return value indicates which queue to use | |
94 | * negative return value indicates to drop the frame */ | |
95 | static inline int classify80211(struct sk_buff *skb, struct Qdisc *qd) | |
96 | { | |
97 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
f0706e82 JB |
98 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
99 | unsigned short fc = le16_to_cpu(hdr->frame_control); | |
100 | int qos; | |
101 | const int ieee802_1d_to_ac[8] = { 2, 3, 3, 2, 1, 1, 0, 0 }; | |
102 | ||
103 | /* see if frame is data or non data frame */ | |
104 | if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)) { | |
105 | /* management frames go on AC_VO queue, but are sent | |
106 | * without QoS control fields */ | |
107 | return IEEE80211_TX_QUEUE_DATA0; | |
108 | } | |
109 | ||
f9d540ee JB |
110 | if (0 /* injected */) { |
111 | /* use AC from radiotap */ | |
f0706e82 JB |
112 | } |
113 | ||
114 | /* is this a QoS frame? */ | |
115 | qos = fc & IEEE80211_STYPE_QOS_DATA; | |
116 | ||
117 | if (!qos) { | |
118 | skb->priority = 0; /* required for correct WPA/11i MIC */ | |
119 | return ieee802_1d_to_ac[skb->priority]; | |
120 | } | |
121 | ||
122 | /* use the data classifier to determine what 802.1d tag the | |
3c3b00ca | 123 | * data frame has */ |
f0706e82 JB |
124 | skb->priority = classify_1d(skb, qd); |
125 | ||
3c3b00ca | 126 | /* in case we are a client verify acm is not set for this ac */ |
f0706e82 JB |
127 | while (unlikely(local->wmm_acm & BIT(skb->priority))) { |
128 | if (wme_downgrade_ac(skb)) { | |
3c3b00ca | 129 | /* No AC with lower priority has acm=0, drop packet. */ |
f0706e82 JB |
130 | return -1; |
131 | } | |
132 | } | |
133 | ||
134 | /* look up which queue to use for frames with this 1d tag */ | |
135 | return ieee802_1d_to_ac[skb->priority]; | |
136 | } | |
137 | ||
138 | ||
139 | static int wme_qdiscop_enqueue(struct sk_buff *skb, struct Qdisc* qd) | |
140 | { | |
141 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
142 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
143 | struct ieee80211_tx_packet_data *pkt_data = | |
144 | (struct ieee80211_tx_packet_data *) skb->cb; | |
145 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
146 | unsigned short fc = le16_to_cpu(hdr->frame_control); | |
147 | struct Qdisc *qdisc; | |
148 | int err, queue; | |
149 | ||
e8bf9649 | 150 | if (pkt_data->flags & IEEE80211_TXPD_REQUEUE) { |
f0706e82 JB |
151 | skb_queue_tail(&q->requeued[pkt_data->queue], skb); |
152 | qd->q.qlen++; | |
153 | return 0; | |
154 | } | |
155 | ||
156 | queue = classify80211(skb, qd); | |
157 | ||
158 | /* now we know the 1d priority, fill in the QoS header if there is one | |
159 | */ | |
160 | if (WLAN_FC_IS_QOS_DATA(fc)) { | |
161 | u8 *p = skb->data + ieee80211_get_hdrlen(fc) - 2; | |
162 | u8 qos_hdr = skb->priority & QOS_CONTROL_TAG1D_MASK; | |
163 | if (local->wifi_wme_noack_test) | |
164 | qos_hdr |= QOS_CONTROL_ACK_POLICY_NOACK << | |
165 | QOS_CONTROL_ACK_POLICY_SHIFT; | |
166 | /* qos header is 2 bytes, second reserved */ | |
167 | *p = qos_hdr; | |
168 | p++; | |
169 | *p = 0; | |
170 | } | |
171 | ||
172 | if (unlikely(queue >= local->hw.queues)) { | |
173 | #if 0 | |
174 | if (net_ratelimit()) { | |
175 | printk(KERN_DEBUG "%s - queue=%d (hw does not " | |
176 | "support) -> %d\n", | |
177 | __func__, queue, local->hw.queues - 1); | |
178 | } | |
179 | #endif | |
180 | queue = local->hw.queues - 1; | |
181 | } | |
182 | ||
183 | if (unlikely(queue < 0)) { | |
184 | kfree_skb(skb); | |
185 | err = NET_XMIT_DROP; | |
186 | } else { | |
187 | pkt_data->queue = (unsigned int) queue; | |
188 | qdisc = q->queues[queue]; | |
189 | err = qdisc->enqueue(skb, qdisc); | |
190 | if (err == NET_XMIT_SUCCESS) { | |
191 | qd->q.qlen++; | |
192 | qd->bstats.bytes += skb->len; | |
193 | qd->bstats.packets++; | |
194 | return NET_XMIT_SUCCESS; | |
195 | } | |
196 | } | |
197 | qd->qstats.drops++; | |
198 | return err; | |
199 | } | |
200 | ||
201 | ||
202 | /* TODO: clean up the cases where master_hard_start_xmit | |
203 | * returns non 0 - it shouldn't ever do that. Once done we | |
204 | * can remove this function */ | |
205 | static int wme_qdiscop_requeue(struct sk_buff *skb, struct Qdisc* qd) | |
206 | { | |
207 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
208 | struct ieee80211_tx_packet_data *pkt_data = | |
209 | (struct ieee80211_tx_packet_data *) skb->cb; | |
210 | struct Qdisc *qdisc; | |
211 | int err; | |
212 | ||
213 | /* we recorded which queue to use earlier! */ | |
214 | qdisc = q->queues[pkt_data->queue]; | |
215 | ||
216 | if ((err = qdisc->ops->requeue(skb, qdisc)) == 0) { | |
217 | qd->q.qlen++; | |
218 | return 0; | |
219 | } | |
220 | qd->qstats.drops++; | |
221 | return err; | |
222 | } | |
223 | ||
224 | ||
225 | static struct sk_buff *wme_qdiscop_dequeue(struct Qdisc* qd) | |
226 | { | |
227 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
228 | struct net_device *dev = qd->dev; | |
229 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
230 | struct ieee80211_hw *hw = &local->hw; | |
231 | struct sk_buff *skb; | |
232 | struct Qdisc *qdisc; | |
233 | int queue; | |
234 | ||
235 | /* check all the h/w queues in numeric/priority order */ | |
236 | for (queue = 0; queue < hw->queues; queue++) { | |
237 | /* see if there is room in this hardware queue */ | |
238 | if (test_bit(IEEE80211_LINK_STATE_XOFF, | |
239 | &local->state[queue]) || | |
240 | test_bit(IEEE80211_LINK_STATE_PENDING, | |
241 | &local->state[queue])) | |
242 | continue; | |
243 | ||
244 | /* there is space - try and get a frame */ | |
245 | skb = skb_dequeue(&q->requeued[queue]); | |
246 | if (skb) { | |
247 | qd->q.qlen--; | |
248 | return skb; | |
249 | } | |
250 | ||
251 | qdisc = q->queues[queue]; | |
252 | skb = qdisc->dequeue(qdisc); | |
253 | if (skb) { | |
254 | qd->q.qlen--; | |
255 | return skb; | |
256 | } | |
257 | } | |
258 | /* returning a NULL here when all the h/w queues are full means we | |
259 | * never need to call netif_stop_queue in the driver */ | |
260 | return NULL; | |
261 | } | |
262 | ||
263 | ||
264 | static void wme_qdiscop_reset(struct Qdisc* qd) | |
265 | { | |
266 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
267 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
268 | struct ieee80211_hw *hw = &local->hw; | |
269 | int queue; | |
270 | ||
271 | /* QUESTION: should we have some hardware flush functionality here? */ | |
272 | ||
273 | for (queue = 0; queue < hw->queues; queue++) { | |
274 | skb_queue_purge(&q->requeued[queue]); | |
275 | qdisc_reset(q->queues[queue]); | |
276 | } | |
277 | qd->q.qlen = 0; | |
278 | } | |
279 | ||
280 | ||
281 | static void wme_qdiscop_destroy(struct Qdisc* qd) | |
282 | { | |
283 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
284 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
285 | struct ieee80211_hw *hw = &local->hw; | |
286 | int queue; | |
287 | ||
288 | tcf_destroy_chain(q->filter_list); | |
289 | q->filter_list = NULL; | |
290 | ||
291 | for (queue=0; queue < hw->queues; queue++) { | |
292 | skb_queue_purge(&q->requeued[queue]); | |
293 | qdisc_destroy(q->queues[queue]); | |
294 | q->queues[queue] = &noop_qdisc; | |
295 | } | |
296 | } | |
297 | ||
298 | ||
299 | /* called whenever parameters are updated on existing qdisc */ | |
1e90474c | 300 | static int wme_qdiscop_tune(struct Qdisc *qd, struct nlattr *opt) |
f0706e82 JB |
301 | { |
302 | /* struct ieee80211_sched_data *q = qdisc_priv(qd); | |
303 | */ | |
304 | /* check our options block is the right size */ | |
305 | /* copy any options to our local structure */ | |
306 | /* Ignore options block for now - always use static mapping | |
1e90474c | 307 | struct tc_ieee80211_qopt *qopt = nla_data(opt); |
f0706e82 | 308 | |
1e90474c | 309 | if (opt->nla_len < nla_attr_size(sizeof(*qopt))) |
f0706e82 JB |
310 | return -EINVAL; |
311 | memcpy(q->tag2queue, qopt->tag2queue, sizeof(qopt->tag2queue)); | |
312 | */ | |
313 | return 0; | |
314 | } | |
315 | ||
316 | ||
317 | /* called during initial creation of qdisc on device */ | |
1e90474c | 318 | static int wme_qdiscop_init(struct Qdisc *qd, struct nlattr *opt) |
f0706e82 JB |
319 | { |
320 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
321 | struct net_device *dev = qd->dev; | |
322 | struct ieee80211_local *local; | |
323 | int queues; | |
324 | int err = 0, i; | |
325 | ||
326 | /* check that device is a mac80211 device */ | |
327 | if (!dev->ieee80211_ptr || | |
328 | dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
329 | return -EINVAL; | |
330 | ||
331 | /* check this device is an ieee80211 master type device */ | |
332 | if (dev->type != ARPHRD_IEEE80211) | |
333 | return -EINVAL; | |
334 | ||
335 | /* check that there is no qdisc currently attached to device | |
336 | * this ensures that we will be the root qdisc. (I can't find a better | |
337 | * way to test this explicitly) */ | |
338 | if (dev->qdisc_sleeping != &noop_qdisc) | |
339 | return -EINVAL; | |
340 | ||
341 | if (qd->flags & TCQ_F_INGRESS) | |
342 | return -EINVAL; | |
343 | ||
344 | local = wdev_priv(dev->ieee80211_ptr); | |
345 | queues = local->hw.queues; | |
346 | ||
347 | /* if options were passed in, set them */ | |
348 | if (opt) { | |
349 | err = wme_qdiscop_tune(qd, opt); | |
350 | } | |
351 | ||
352 | /* create child queues */ | |
353 | for (i = 0; i < queues; i++) { | |
354 | skb_queue_head_init(&q->requeued[i]); | |
355 | q->queues[i] = qdisc_create_dflt(qd->dev, &pfifo_qdisc_ops, | |
356 | qd->handle); | |
136e83d6 | 357 | if (!q->queues[i]) { |
f0706e82 JB |
358 | q->queues[i] = &noop_qdisc; |
359 | printk(KERN_ERR "%s child qdisc %i creation failed", dev->name, i); | |
360 | } | |
361 | } | |
362 | ||
363 | return err; | |
364 | } | |
365 | ||
366 | static int wme_qdiscop_dump(struct Qdisc *qd, struct sk_buff *skb) | |
367 | { | |
368 | /* struct ieee80211_sched_data *q = qdisc_priv(qd); | |
369 | unsigned char *p = skb->tail; | |
370 | struct tc_ieee80211_qopt opt; | |
371 | ||
372 | memcpy(&opt.tag2queue, q->tag2queue, TC_80211_MAX_TAG + 1); | |
1e90474c | 373 | NLA_PUT(skb, TCA_OPTIONS, sizeof(opt), &opt); |
f0706e82 JB |
374 | */ return skb->len; |
375 | /* | |
1e90474c | 376 | nla_put_failure: |
f0706e82 JB |
377 | skb_trim(skb, p - skb->data);*/ |
378 | return -1; | |
379 | } | |
380 | ||
381 | ||
382 | static int wme_classop_graft(struct Qdisc *qd, unsigned long arg, | |
383 | struct Qdisc *new, struct Qdisc **old) | |
384 | { | |
385 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
386 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
387 | struct ieee80211_hw *hw = &local->hw; | |
388 | unsigned long queue = arg - 1; | |
389 | ||
390 | if (queue >= hw->queues) | |
391 | return -EINVAL; | |
392 | ||
393 | if (!new) | |
394 | new = &noop_qdisc; | |
395 | ||
396 | sch_tree_lock(qd); | |
397 | *old = q->queues[queue]; | |
398 | q->queues[queue] = new; | |
399 | qdisc_reset(*old); | |
400 | sch_tree_unlock(qd); | |
401 | ||
402 | return 0; | |
403 | } | |
404 | ||
405 | ||
406 | static struct Qdisc * | |
407 | wme_classop_leaf(struct Qdisc *qd, unsigned long arg) | |
408 | { | |
409 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
410 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
411 | struct ieee80211_hw *hw = &local->hw; | |
412 | unsigned long queue = arg - 1; | |
413 | ||
414 | if (queue >= hw->queues) | |
415 | return NULL; | |
416 | ||
417 | return q->queues[queue]; | |
418 | } | |
419 | ||
420 | ||
421 | static unsigned long wme_classop_get(struct Qdisc *qd, u32 classid) | |
422 | { | |
423 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
424 | struct ieee80211_hw *hw = &local->hw; | |
425 | unsigned long queue = TC_H_MIN(classid); | |
426 | ||
427 | if (queue - 1 >= hw->queues) | |
428 | return 0; | |
429 | ||
430 | return queue; | |
431 | } | |
432 | ||
433 | ||
434 | static unsigned long wme_classop_bind(struct Qdisc *qd, unsigned long parent, | |
435 | u32 classid) | |
436 | { | |
437 | return wme_classop_get(qd, classid); | |
438 | } | |
439 | ||
440 | ||
441 | static void wme_classop_put(struct Qdisc *q, unsigned long cl) | |
442 | { | |
443 | } | |
444 | ||
445 | ||
446 | static int wme_classop_change(struct Qdisc *qd, u32 handle, u32 parent, | |
1e90474c | 447 | struct nlattr **tca, unsigned long *arg) |
f0706e82 JB |
448 | { |
449 | unsigned long cl = *arg; | |
450 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
451 | struct ieee80211_hw *hw = &local->hw; | |
452 | ||
453 | if (cl - 1 > hw->queues) | |
454 | return -ENOENT; | |
455 | ||
456 | /* TODO: put code to program hardware queue parameters here, | |
457 | * to allow programming from tc command line */ | |
458 | ||
459 | return 0; | |
460 | } | |
461 | ||
462 | ||
463 | /* we don't support deleting hardware queues | |
464 | * when we add WMM-SA support - TSPECs may be deleted here */ | |
465 | static int wme_classop_delete(struct Qdisc *qd, unsigned long cl) | |
466 | { | |
467 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
468 | struct ieee80211_hw *hw = &local->hw; | |
469 | ||
470 | if (cl - 1 > hw->queues) | |
471 | return -ENOENT; | |
472 | return 0; | |
473 | } | |
474 | ||
475 | ||
476 | static int wme_classop_dump_class(struct Qdisc *qd, unsigned long cl, | |
477 | struct sk_buff *skb, struct tcmsg *tcm) | |
478 | { | |
479 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
480 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
481 | struct ieee80211_hw *hw = &local->hw; | |
482 | ||
483 | if (cl - 1 > hw->queues) | |
484 | return -ENOENT; | |
485 | tcm->tcm_handle = TC_H_MIN(cl); | |
486 | tcm->tcm_parent = qd->handle; | |
487 | tcm->tcm_info = q->queues[cl-1]->handle; /* do we need this? */ | |
488 | return 0; | |
489 | } | |
490 | ||
491 | ||
492 | static void wme_classop_walk(struct Qdisc *qd, struct qdisc_walker *arg) | |
493 | { | |
494 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
495 | struct ieee80211_hw *hw = &local->hw; | |
496 | int queue; | |
497 | ||
498 | if (arg->stop) | |
499 | return; | |
500 | ||
501 | for (queue = 0; queue < hw->queues; queue++) { | |
502 | if (arg->count < arg->skip) { | |
503 | arg->count++; | |
504 | continue; | |
505 | } | |
506 | /* we should return classids for our internal queues here | |
507 | * as well as the external ones */ | |
508 | if (arg->fn(qd, queue+1, arg) < 0) { | |
509 | arg->stop = 1; | |
510 | break; | |
511 | } | |
512 | arg->count++; | |
513 | } | |
514 | } | |
515 | ||
516 | ||
517 | static struct tcf_proto ** wme_classop_find_tcf(struct Qdisc *qd, | |
518 | unsigned long cl) | |
519 | { | |
520 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
521 | ||
522 | if (cl) | |
523 | return NULL; | |
524 | ||
525 | return &q->filter_list; | |
526 | } | |
527 | ||
528 | ||
529 | /* this qdisc is classful (i.e. has classes, some of which may have leaf qdiscs attached) | |
530 | * - these are the operations on the classes */ | |
20fea08b | 531 | static const struct Qdisc_class_ops class_ops = |
f0706e82 JB |
532 | { |
533 | .graft = wme_classop_graft, | |
534 | .leaf = wme_classop_leaf, | |
535 | ||
536 | .get = wme_classop_get, | |
537 | .put = wme_classop_put, | |
538 | .change = wme_classop_change, | |
539 | .delete = wme_classop_delete, | |
540 | .walk = wme_classop_walk, | |
541 | ||
542 | .tcf_chain = wme_classop_find_tcf, | |
543 | .bind_tcf = wme_classop_bind, | |
544 | .unbind_tcf = wme_classop_put, | |
545 | ||
546 | .dump = wme_classop_dump_class, | |
547 | }; | |
548 | ||
549 | ||
550 | /* queueing discipline operations */ | |
20fea08b | 551 | static struct Qdisc_ops wme_qdisc_ops __read_mostly = |
f0706e82 JB |
552 | { |
553 | .next = NULL, | |
554 | .cl_ops = &class_ops, | |
555 | .id = "ieee80211", | |
556 | .priv_size = sizeof(struct ieee80211_sched_data), | |
557 | ||
558 | .enqueue = wme_qdiscop_enqueue, | |
559 | .dequeue = wme_qdiscop_dequeue, | |
560 | .requeue = wme_qdiscop_requeue, | |
561 | .drop = NULL, /* drop not needed since we are always the root qdisc */ | |
562 | ||
563 | .init = wme_qdiscop_init, | |
564 | .reset = wme_qdiscop_reset, | |
565 | .destroy = wme_qdiscop_destroy, | |
566 | .change = wme_qdiscop_tune, | |
567 | ||
568 | .dump = wme_qdiscop_dump, | |
569 | }; | |
570 | ||
571 | ||
572 | void ieee80211_install_qdisc(struct net_device *dev) | |
573 | { | |
574 | struct Qdisc *qdisc; | |
575 | ||
576 | qdisc = qdisc_create_dflt(dev, &wme_qdisc_ops, TC_H_ROOT); | |
577 | if (!qdisc) { | |
578 | printk(KERN_ERR "%s: qdisc installation failed\n", dev->name); | |
579 | return; | |
580 | } | |
581 | ||
582 | /* same handle as would be allocated by qdisc_alloc_handle() */ | |
583 | qdisc->handle = 0x80010000; | |
584 | ||
585 | qdisc_lock_tree(dev); | |
586 | list_add_tail(&qdisc->list, &dev->qdisc_list); | |
587 | dev->qdisc_sleeping = qdisc; | |
588 | qdisc_unlock_tree(dev); | |
589 | } | |
590 | ||
591 | ||
592 | int ieee80211_qdisc_installed(struct net_device *dev) | |
593 | { | |
594 | return dev->qdisc_sleeping->ops == &wme_qdisc_ops; | |
595 | } | |
596 | ||
597 | ||
598 | int ieee80211_wme_register(void) | |
599 | { | |
600 | return register_qdisc(&wme_qdisc_ops); | |
601 | } | |
602 | ||
603 | ||
604 | void ieee80211_wme_unregister(void) | |
605 | { | |
606 | unregister_qdisc(&wme_qdisc_ops); | |
607 | } |